There’s usually the fun of delving deeper into a psycho killers mind and understanding the motives and the logic THEY believe in, thats what makes horror like this good. Author missed the mark of creating an interesting MC by only trying to gross the reader out with random things
There's no deep meaning, if ur reaction is along the lines of 'well...' to this book, then know it's a good book.
There's no plot, no logic because it's ab a psych serial killer. You think them man run on logic??